Create auto-update-changelog workflow

.github/workflows/auto-update-changelog.yaml

@@ -0,0 +1,50 @@
+name: Auto-update changelog
+
+on:
+  workflow_call:
+    secrets:
+      ANTHROPIC_API_KEY:
+        required: true
+      TAYLORBOT_GITHUB_ACTION:
+        required: true
+
+permissions: {}
+
+jobs:
+  report:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # To push commits
+      pull-requests: write # To comment in PR
+    steps:
+      - uses: actions/setup-node@6044e13b5dc448c55e2357c09f80417699197238 # v6.2.0
+        with:
+          node-version: '20'
+
+      - name: Checkout
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          fetch-depth: 0 # We need the full history to compare changes
+          persist-credentials: false
+
+      - name: Update changelog
+        uses: anthropics/claude-code-action@70e16deb18402428bd09e08d1ec3662a872e3c72 # v1.0.41
+        with:
+          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
+          github_token: ${{ secrets.TAYLORBOT_GITHUB_ACTION }}
+          prompt: |
+            If a CHANGELOG.md file exists in the repository root, check if the current pull
+            request updates it.
+
+            If CHANGELOG.md exists but is not updated in this PR, update it with information
+            about the changes in this branch compared to the default branch.
+
+            Normally, dependency updates fall under the `### Changed` category. In some cases,
+            if they are security-related, they might fall under the `### Fixed` category. Check
+            the pull request title and description for hints.
+
+            Comment into the PR to inform the author about your updating of the changelog.
+          claude_args: >
+            --max-turns 10
+            --model claude-haiku-4-5-20251101
+            --allowedTools Bash